Poor humiliation from clicks Diamond Pavilion kimberley

I was humiliated at clicks Diamond Pavilion store in Kimberley, where me and my friend walked in to buy sun screen as we were going to a soul session show. Upon leaving the store their security machine went off, I went back into the store and asked the security my bag is going off so what is it. I also had a plastic with me with goods I bought from another store I thought this might be the reason. So I told the lady at the counter that the previous day I bought a 3 pack perfume from Taung clicks store I have one perfume in my bag maybe t could be the one setting the machine off. To find it wasn't so then she said not it's the make up. I said to her the make up in my bag is old and was bought online not from your store. The security guy antagonised me and said no let's go to the back. I told him no way in hell am I doing a walk of shame we're I didn't even go anywhere your make up department and I told him dude you searched my bag what did you find I asked the lady she said nothing she searched the bag again found nothing. The security kept saying to me now why is your bag going off if you didn't take nothing. I asked him you have cctv footage I am sure if you're a professional you can check it and see if I took anything from the store, stop embarrassing me I front of customers he told me I am making a scene he is not embarrassing me. I am angry I am furious actually at the lack of professionalism experienced there not a single apology from them. They can go and review their cameras I am considering legal action.